compiler: use is_none_or where it is clearly better

heuristic was: if it easily allows removing bangs entirely? worth it.
if it requires more effort or just moves the bang? not.

compiler/rustc_resolve/src/check_unused.rs

@@ -184,11 +184,11 @@ impl<'a, 'ra, 'tcx> UnusedImportCheckVisitor<'a, 'ra, 'tcx> {
 
             // If the extern crate isn't in the extern prelude,
             // there is no way it can be written as a `use`.
-            if !self
+            if self
                 .r
                 .extern_prelude
                 .get(&extern_crate.ident)
-                .is_some_and(|entry| !entry.introduced_by_item)
+                .is_none_or(|entry| entry.introduced_by_item)
             {
                 continue;
             }